COLOMBIA, 1921, "$030c" (Inverted) on "Valor 10 Centavos" on 50c Pale Green, Air Post Surcharge (Colomphil 16).
Excellent centering, with usual three-line Bogota handstamp, slight thinning at bottom, Very Fine appearance, only seven used examples
have been recorded with no covers known, all of these are believed to have originated on correspondence to New York, ex Cole, Matthews and Friedman, signed Rendon and with 1984 Friedl certificate, unlisted in Scott
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